OBJECTIVE To discuss the calculation and epidemiological significance for risk factors adjusted incidence density of nosocomial infection.
目的探讨危险因素调整的医院感染发病密度的计算方法及意义。
Methods to compare the principles and calculation methods of cumulative incidence rate, incidence density, and risk factors adjusted incidence density.
方法比较医院感染累积发病率、发病密度和危险因素调整的发病密度的计算原理。
The correlation coefficients of rat density, deratization rates and the incidence of rat transmissible diseases were calculated.
同时，分别以鼠密度、灭鼠率的变化与鼠传疾病发病率进行相关系数分析。
The results indicate incidence laser intensity and plasma background density are important factors affecting convergent intensity.
计算结果表明：入射激光强度、入射激光波长及等离子体背景密度是影响会聚强度的重要因素。
Bone mineral density and the incidence of fracture were evaluated.
临床评价指标包括骨矿物质密度和骨折发生率。
Disease incidence related closely with not only varieties and meterological condition, but cultivation practices such as irrigation, sowing date, sowing density, sowing method and so on.
发病程度除与品种、气象条件有关外，还与灌水，播种时期，密度，播种方法等栽培措施关系密切。
Please keep proper cultivation distance, avoid excessive density, causing a high incidence, select well drained soils.
请保持适当的栽培距离，避免过度密植，导致发病率高，选择排水良好的土壤。
Study found that female smokers smoke every 10 years, bone mineral density is reduced by 2.3%-3.3% fall in bone density leading to fractures and osteoporosis incidence rate rose significantly.
研究发现，女烟民每吸烟10年，骨矿物质密度就会降低2.3%―3.3%，骨质密度下降会导致骨折和骨质疏松症发病率大增。
The result showed that the incidence of malaria and the serum antibody level of the residents declined after the mosquito density had declined.
结果：当中华按蚊密度降低时，疟疾发病、居民血清抗体水平亦随之下降。
ObjectiveTo observe the effects of long-term and low-dose hormone replacement therapy on bone mineral density (BMD), and the incidence of bone pain in postmenopausal women.
目的观察长期应用小剂量性激素替代疗法对绝经后妇女骨密度及骨关节痛发生的影响。
Objective to study the influence of the rodent density to the incidence of leptospirosis, and work out the methods to prevent and control the leptospirosis epidemic.
目的研究鼠类种群数量变动对钩端螺旋体病(简称钩体病)流行的影响，以便制定控制钩体病流行的对策。
Objective to study the influence of the rodent density to the incidence of leptospirosis, and work out the methods to prevent and control the leptospirosis epidemic.
目的研究鼠类种群数量变动对钩端螺旋体病(简称钩体病)流行的影响，以便制定控制钩体病流行的对策。
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